过氧化氢改性活性炭对三甲胺废气的吸附

Hydrogen peroxide modified activated carbon for adsorption of trimethylamine exhaust

对煤质柱状活性炭进行H2O2改性,测试了H2O2改性前后活性炭的比表面积和含氧官能团,研究了其对三甲胺的静态吸附量、动态穿透曲线、脱附活化能。结果表明,经氧化改性后活性炭的表面含氧官能团、比表面积均有明显提高,其中以体积分数为15%的H2O2溶液浸渍1.5h后的活性炭最佳。其对三甲胺的吸附量达到440.9mg/g,较改性前提高了281.5%。对三甲胺的动态吸附穿透时间由10min提高到35min,脱附活化能由11.461kJ/mol提高到15.663kJ/mol,改性后活性炭的吸附性能得以提高。

The columnar activated carbon from coal is modified by H2O2,and the specific surface area and oxygen-containing functional groups of activated carbon are tested before and after H2O2-modified.The static adsorption capacity of trimethylamine,the dynamic penetration curve,and the desorption activation energy of activated carbon are also studied.Experimental results show that surface oxygen functional groups and specific surface area of activated carbon modified with oxidation are significantly improved,and activated carbon treated with 15% H2O2 for 1.5 h is the best.The trimethylamine adsorption capacity can reach 440.9 mg/g,which is 281.5% greater than before.The dynamic adsorption breakthrough time for trimethylamine increases from 10 min to 35 min,and the desorption activation energy increases from 11.461 kJ/mol to 15.663 kJ/mol,which proves that the adsorption performance of modified activated carbon is enhanced.